2009998140 has 24 divisors (see below), whose sum is σ = 5627994960. Its totient is φ = 535999488.

The previous prime is 2009998121. The next prime is 2009998169. The reversal of 2009998140 is 418999002.

It is a junction number, because it is equal to n+sod(n) for n = 2009998092 and 2009998101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16749925 + ... + 16750044.

It is an arithmetic number, because the mean of its divisors is an integer number (234499790).

Almost surely, 2^2009998140 is an apocalyptic number.

2009998140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2009998140 is an abundant number, since it is smaller than the sum of its proper divisors (3617996820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2009998140 is a wasteful number, since it uses less digits than its factorization.

2009998140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33499981 (or 33499979 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 2009998140 is about 44833.0027992772. The cubic root of 2009998140 is about 1262.0170389409.

The spelling of 2009998140 in words is "two billion, nine million, nine hundred ninety-eight thousand, one hundred forty".